D3D12CreateDevice

// d3d12.dll
#include <windows.h>

HRESULT D3D12CreateDevice(
    IUnknown* pAdapter,   // optional
    D3D_FEATURE_LEVEL MinimumFeatureLevel,
    const GUID* riid,
    void** ppDevice   // optional
);

<DllImport("d3d12.dll", ExactSpelling:=True)>
Public Shared Function D3D12CreateDevice(
    pAdapter As IntPtr,   ' IUnknown* optional
    MinimumFeatureLevel As Integer,   ' D3D_FEATURE_LEVEL
    ByRef riid As Guid,   ' GUID*
    ppDevice As IntPtr   ' void** optional, out
) As Integer
End Function

' pAdapter : IUnknown* optional
' MinimumFeatureLevel : D3D_FEATURE_LEVEL
' riid : GUID*
' ppDevice : void** optional, out
Declare PtrSafe Function D3D12CreateDevice Lib "d3d12" ( _
    ByVal pAdapter As LongPtr, _
    ByVal MinimumFeatureLevel As Long, _
    ByVal riid As LongPtr, _
    ByVal ppDevice As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

D3D12CreateDevice = ctypes.windll.d3d12.D3D12CreateDevice
D3D12CreateDevice.restype = ctypes.c_int
D3D12CreateDevice.argtypes = [
    ctypes.c_void_p,  # pAdapter : IUnknown* optional
    ctypes.c_int,  # MinimumFeatureLevel : D3D_FEATURE_LEVEL
    ctypes.c_void_p,  # riid : GUID*
    ctypes.c_void_p,  # ppDevice : void** optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('d3d12.dll')
D3D12CreateDevice = Fiddle::Function.new(
  lib['D3D12CreateDevice'],
  [
    Fiddle::TYPE_VOIDP,  # pAdapter : IUnknown* optional
    Fiddle::TYPE_INT,  # MinimumFeatureLevel : D3D_FEATURE_LEVEL
    Fiddle::TYPE_VOIDP,  # riid : GUID*
    Fiddle::TYPE_VOIDP,  # ppDevice : void** optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "d3d12")]
extern "system" {
    fn D3D12CreateDevice(
        pAdapter: *mut core::ffi::c_void,  // IUnknown* optional
        MinimumFeatureLevel: i32,  // D3D_FEATURE_LEVEL
        riid: *const GUID,  // GUID*
        ppDevice: *mut *mut ()  // void** optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("d3d12.dll")]
public static extern int D3D12CreateDevice(IntPtr pAdapter, int MinimumFeatureLevel, ref Guid riid, IntPtr ppDevice);
"@
$api = Add-Type -MemberDefinition $sig -Name 'd3d12_D3D12CreateDevice' -Namespace Win32 -PassThru
# $api::D3D12CreateDevice(pAdapter, MinimumFeatureLevel, riid, ppDevice)

#uselib "d3d12.dll"
#func global D3D12CreateDevice "D3D12CreateDevice" sptr, sptr, sptr, sptr
; D3D12CreateDevice pAdapter, MinimumFeatureLevel, varptr(riid), ppDevice   ; 戻り値は stat
; pAdapter : IUnknown* optional -> "sptr"
; MinimumFeatureLevel : D3D_FEATURE_LEVEL -> "sptr"
; riid : GUID* -> "sptr"
; ppDevice : void** optional, out -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

#uselib "d3d12.dll"
#cfunc global D3D12CreateDevice "D3D12CreateDevice" sptr, int, var, sptr
; res = D3D12CreateDevice(pAdapter, MinimumFeatureLevel, riid, ppDevice)
; pAdapter : IUnknown* optional -> "sptr"
; MinimumFeatureLevel : D3D_FEATURE_LEVEL -> "int"
; riid : GUID* -> "var"
; ppDevice : void** optional, out -> "sptr"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; HRESULT D3D12CreateDevice(IUnknown* pAdapter, D3D_FEATURE_LEVEL MinimumFeatureLevel, GUID* riid, void** ppDevice)
#uselib "d3d12.dll"
#cfunc global D3D12CreateDevice "D3D12CreateDevice" intptr, int, var, intptr
; res = D3D12CreateDevice(pAdapter, MinimumFeatureLevel, riid, ppDevice)
; pAdapter : IUnknown* optional -> "intptr"
; MinimumFeatureLevel : D3D_FEATURE_LEVEL -> "int"
; riid : GUID* -> "var"
; ppDevice : void** optional, out -> "intptr"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	d3d12 = windows.NewLazySystemDLL("d3d12.dll")
	procD3D12CreateDevice = d3d12.NewProc("D3D12CreateDevice")
)

// pAdapter (IUnknown* optional), MinimumFeatureLevel (D3D_FEATURE_LEVEL), riid (GUID*), ppDevice (void** optional, out)
r1, _, err := procD3D12CreateDevice.Call(
	uintptr(pAdapter),
	uintptr(MinimumFeatureLevel),
	uintptr(riid),
	uintptr(ppDevice),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function D3D12CreateDevice(
  pAdapter: Pointer;   // IUnknown* optional
  MinimumFeatureLevel: Integer;   // D3D_FEATURE_LEVEL
  riid: PGUID;   // GUID*
  ppDevice: Pointer   // void** optional, out
): Integer; stdcall;
  external 'd3d12.dll' name 'D3D12CreateDevice';

result := DllCall("d3d12\D3D12CreateDevice"
    , "Ptr", pAdapter   ; IUnknown* optional
    , "Int", MinimumFeatureLevel   ; D3D_FEATURE_LEVEL
    , "Ptr", riid   ; GUID*
    , "Ptr", ppDevice   ; void** optional, out
    , "Int")   ; return: HRESULT

●D3D12CreateDevice(pAdapter, MinimumFeatureLevel, riid, ppDevice) = DLL("d3d12.dll", "int D3D12CreateDevice(void*, int, void*, void*)")
# 呼び出し: D3D12CreateDevice(pAdapter, MinimumFeatureLevel, riid, ppDevice)
# pAdapter : IUnknown* optional -> "void*"
# MinimumFeatureLevel : D3D_FEATURE_LEVEL -> "int"
# riid : GUID* -> "void*"
# ppDevice : void** optional, out -> "void*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。